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vastus medialis and patellofemoral

Guang-Ying Zhang, Lei Zheng, Hao Shi, Wei Liu, Li Zhang, Su-Hui Qu, Zheng-Wu Bai, Hong-Yu Ding
PURPOSE: To evaluate the correlation between injury patterns of the medial patellofemoral ligament (MPFL) and vastus medialis obliquus (VMO) after acute first-time lateral patellar dislocation (LPD) in adults. METHODS: Magnetic resonance imaging (MRI) was prospectively performed in 132 consecutive adults with acute first-time LPD. Images were acquired and evaluated using standardized protocols. Injury patterns of MPFL were grouped by location and severity for analysis of the prevalence of VMO injury...
December 27, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Lauren C Benson, Thomas G Almonroeder, Kristian M O'Connor
Patellofemoral pain (PFP) is common among runners and those recovering from anterior cruciate ligament reconstruction. Training programs designed to prevent or treat injuries often include balance training, although balance interventions have been reported to coincide with more knee injuries. Knowledge of the effect of balance exercises on knee mechanics may be useful when designing training programs. High knee abduction moment has been implicated in the development of PFP, and imbalance between vastus lateralis (VL) and vastus medialis oblique (VMO) may contribute to patellofemoral stress...
December 24, 2016: Human Movement Science
Cynthia Gobbi Alves Araújo, Christiane de Souza Guerino Macedo, Daiene Ferreira, Leonardo Shigaki, Rubens A da Silva
: The purpose of this study was to assess the effect of patellar taping on muscle activation of the knee and hip muscles in women with Patellofemoral Pain Syndrome during five proprioceptive exercises. Forty sedentary women with syndrome were randomly allocated in two groups: Patellar Taping (based in McConnell) and Placebo (vertical taping on patella without any stretching of lateral structures of the knee). Volunteers performed five proprioceptive exercises randomly: Swing apparatus, Mini-trampoline, Bosu balance ball, Anteroposterior sway on a rectangular board and Mediolateral sway on a rectangular board...
December 2016: Journal of Electromyography and Kinesiology
Gang Ji, Shengjie Wang, Xiaomeng Wang, Junhang Liu, Jinghui Niu, Fei Wang
The objective of the present study was to compare the clinical results of the surgical versus nonsurgical treatments of acute primary patellar dislocations with a medial patellofemoral ligament (MPFL) injury in the nonoverlap region with the vastus medialis oblique. In this study, 62 patients with an acute patellar dislocation and a concurrent MPFL injury in the nonoverlap region were randomly divided into two groups based on their birth years (even vs. odd years) and received either surgical or nonsurgical treatment...
September 14, 2016: Journal of Knee Surgery
L H Goldman, K Tang, L Facchetti, U Heilmeier, G B Joseph, M C Nevitt, C E McCulloch, R B Souza, T M Link
OBJECTIVE: To determine in a 48-month longitudinal study the association of thigh muscle cross-sectional area (CSA) and strength on progression of morphologic knee cartilage degeneration using 3T magnetic resonance imaging (MRI). DESIGN: Seventy Osteoarthritis Initiative (OAI) subjects aged 50-60 years, with no radiographic evidence of osteoarthritis (OA) and constant muscle strength over 48 months as measured by isometric knee extension testing were included. Baseline right thigh muscle CSAs were assessed on axial T1-weighted magnetic resonance (MR) images, and extensor to flexor CSA ratios were calculated...
July 25, 2016: Osteoarthritis and Cartilage
Danilo de Oliveira Silva, Fernando Henrique Magalhães, Nathálie Clara Faria, Deisi Ferrari, Marcella Ferraz Pazzinatto, Evangelos Pappas, Fábio Mícolis de Azevedo
OBJECTIVE: To determine the association between the amplitude of vastus medialis (VM) Hoffmann reflex (H-reflex) and pain level, self-reported physical function, and chronicity of pain in women with patellofemoral pain (PFP). DESIGN: Cross-sectional study. SETTING: Laboratory of biomechanics and motor control. PARTICIPANTS: Women diagnosed with PFP (N=15) aged 18 to 35 years. INTERVENTIONS: Not applicable...
January 2017: Archives of Physical Medicine and Rehabilitation
Teresa Errigo Vitale, Brianne Mooney, Ashley Vitale, Demitra Apergis, Stephen Wirth, Mark G Grossman
BACKGROUND: The incidence of patellar subluxation or dislocation has been documented up to 43/100,000 with females more prevalent then males. There are many contributing factors involving the hip, knee, and ankle that lead to patellar subluxation. A patellar position of lateral tilt with lateral glide may indicate weakness of the vastus medialis oblique (VMO) and adductors, increased tightness in the iliotibial band, and overpowering of the vastus lateralis. Patella alta can predispose an individual to lateral dislocation due to the patella placement outside of the femoral trochlear groove with a disadvantage of boney stability...
June 2016: International Journal of Sports Physical Therapy
Tae-Kyung Lee, So-Mi Park, Sae-Bom Yun, Ae-Ran Lee, Yun-Seob Lee, Min-Sik Yong
[Purpose] The present study investigated the effects of squat exercises with and without a variety of tools including a gym ball, wedge, and elastic band on the vastus lateralis and vastus medialis oblique muscles. [Subjects and Methods] A total of twenty healthy subjects with no history of neurological, musculoskeletal injury, or pain in the lower extremities were recruited. All subjects performed four types of exercise (conventional squat exercise, squat exercise with a gym ball, squat exercise with a wedge, squat exercise with an elastic band)...
March 2016: Journal of Physical Therapy Science
K-D Heller
BACKGROUND: Patellofemoral complications after total knee arthroplasty are responsible for a variety of surgical revisions. OBJECTIVE: The causes of the various types of instability of the patella are listed in a differentiated way and the importance of clinical and imaging diagnostics as well as preventive strategies are elaborated. MATERIAL AND METHODS: This article is based on a selective literature search in the PubMed database and on the long-standing experience of the author...
May 2016: Der Orthopäde
Michael S Rathleff, Afshin Samani, Jens L Olesen, Ewa M Roos, Sten Rasmussen, Pascal Madeleine
BACKGROUND: Female adolescents with patellofemoral pain are characterized by altered neuromuscular knee control and reduced maximal quadriceps torque. The purpose of this study is to investigate whether exercise therapy and patient education are associated with larger improvements in neuromuscular knee control and maximal quadriceps torque compared with patient education alone. METHODS: This is an ancillary analysis of a cluster randomized controlled trial investigating the effect of patient education and exercise therapy on self-reported recovery in 121 adolescents with patellofemoral pain...
May 2016: Clinical Biomechanics
Alireza Motealleh, Elham Gheysari, Esmaeil Shokri, Sobhan Sobhani
OBJECTIVE: To evaluate the immediate effect of lubmopelvic manipulation on EMG activity of vastus medialis, vastus lateralis and gluteus medius as well as pain and functional performance of athletes with patellofemoral pain syndrome. DESIGN: Randomized placebo-controlled trial. METHODS: Twenty eight athletes with patellofemoral pain syndrome were randomly assigned to two groups. One group received a lubmopelvic manipulation at the side of the involved knee while the other group received a sham manipulation...
April 2016: Manual Therapy
Neal R Glaviano, Susan A Saliba
CONTEXT: For individuals with patellofemoral pain (PFP), altered muscle activity and pain are common during functional tasks. Clinicians often seek interventions to improve muscle activity and reduce impairments. One intervention that has not been examined in great detail is electrical stimulation. OBJECTIVE: To determine whether a single patterned electrical neuromuscular stimulation (PENS) treatment would alter muscle activity and pain in individuals with PFP during 2 functional tasks, a single-legged squat and a lateral step down...
February 2016: Journal of Athletic Training
Alexander E Weber, Amit Nathani, Joshua S Dines, Answorth A Allen, Beth E Shubin-Stein, Elizabeth A Arendt, Asheesh Bedi
High-level evidence supports nonoperative treatment for first-time lateral acute patellar dislocations. Surgical intervention is often indicated for recurrent dislocations. Recurrent instability is often multifactorial and can be the result of a combination of coronal limb malalignment, patella alta, malrotation secondary to internal femoral or external tibial torsion, a dysplastic trochlea, or disrupted and weakened medial soft tissue, including the medial patellofemoral ligament (MPFL) and the vastus medialis obliquus...
March 2, 2016: Journal of Bone and Joint Surgery. American Volume
Anne Hickey, Diana Hopper, Toby Hall, Catherine Y Wild
BACKGROUND: Patellofemoral pain (PFP) affects 25% of the general population, occurring 2 times more often in females compared with males. Taping is a valuable component of the management plan for altering lower limb biomechanics and providing pain relief; however, the effects of alternative taping techniques, such as Mulligan knee taping, appear yet to be researched. PURPOSE: To determine whether the Mulligan knee taping technique altered levels of perceived knee pain and lower limb biomechanics during a single-legged squat (SLSq) in adult females with PFP...
May 2016: American Journal of Sports Medicine
Arthur B Meyers, Tal Laor, Mark Sharafinski, Andrew M Zbojniewicz
Transient patellar dislocation is a common entity in children and adolescents, characterized by lateral dislocation of the patella, usually with spontaneous reduction. Many predisposing conditions have been described, including trochlear dysplasia, excessive lateral patellar tilt, patella alta and lateralization of the tibial tuberosity. Associated injuries are bone bruises of the patella and lateral femoral condyle, tears of the medial retinaculum that include the medial patellofemoral ligament (MPFL), tears of the vastus medialis obliquus muscle, injuries of articular cartilage, and intra-articular bodies...
May 2016: Pediatric Radiology
Krzysztof Malecki, Jarosław Fabis, Pawel Flont, Zbigniew Lipczyk, Kryspin Niedzielski
PURPOSE: Recurrent patellar dislocation is defined as a dislocation occurring more than once. There is no consensus as to the choice of operative technique for recurrent dislocation in adolescents. Recently, great importance has been attributed to MPFL reconstruction. The aim of this study is to evaluate the value of MPFL reconstruction (group A) in adolescents by comparing MPFL reconstruction with combined soft tissue proximal and distal alignment (group B). METHODS: MPFL reconstruction by means of Avikainen's technique was performed on 32 knees...
September 2016: International Orthopaedics
J Chouteau
Various treatments for patellofemoral instability have been proposed, such as lowering or medialization of the tibial tubercle, division of the lateral retinaculum, plication of the medial retinaculum, lowering of the vastus medialis, and trochleoplasty. However, it has been difficult to analyze the outcomes of each technique because they are often performed in combination. Recent anatomical and biomechanical studies have shown that the medial patellofemoral ligament (MPFL) is the primary stabilizer of the patella between full extension and 30° flexion...
February 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
Danilo de Oliveira Silva, Fernando Henrique Magalhães, Nathálie Clara Faria, Marcella Ferraz Pazzinatto, Deisi Ferrari, Evangelos Pappas, Fábio Mícolis de Azevedo
OBJECTIVES: To investigate whether vastus medialis (VM) Hoffmann reflexes (H-reflexes) differ on the basis of the presence or absence of patellofemoral pain (PFP) and to assess the capability of VM H-reflex measurements in accurately discriminating between women with and without PFP. DESIGN: Cross-sectional study. SETTING: Laboratory of biomechanics and motor control. PARTICIPANTS: Women (N=30) aged 18 to 35 years were recruited, consisting of 2 groups: women with PFP (n=15) and asymptomatic controls (n=15)...
July 2016: Archives of Physical Medicine and Rehabilitation
Ronaldo Valdir Briani, Danilo de Oliveira Silva, Marcella Ferraz Pazzinatto, Amanda Schenatto Ferreira, Deisi Ferrari, Fábio Mícolis de Azevedo
The aims of this study were to examine group differences in muscle activation onset of the vastus medialis (VM) in relation to the vastus lateralis (VL) and pain level during stair ascent in females with patellofemoral pain (PFP) who maintain high and moderate levels of physical activity; to determine the association between physical activity level and muscle activation onset. Forty-three females with PFP and thirty-eight pain-free females were recruited and divided into four groups based on their level of physical activity: females with PFP (n=26) and pain-free females (n=26) who practiced a moderate level of physical activity and females with PFP (n=17) and pain-free females (n=12) who practiced an intense amount of physical activity...
February 2016: Journal of Electromyography and Kinesiology
Ping Miao, Yi Xu, Cuihuan Pan, Hao Liu, Chuhuai Wang
BACKGROUND: The purpose was to investigate the effect of double-leg semisquat with hip adduction on the activation of vastus medialis oblique (VMO) and vastus lateralis (VL) in patients with patellofemoral pain syndrome (PFPS). METHODS: Thirty patients with PFPS were designated to the study group, while 30 healthy matched subjects were enrolled in the control group. The activation of VL and VMO was recorded with surface electromyography (EMG) during double-leg semisquat (DS) and double-leg semisquat with hip adduction (DS-HA)...
2015: BMC Musculoskeletal Disorders
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